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author | 2005-10-29 18:15:48 -0700 | |
---|---|---|
committer | 2005-10-29 21:40:35 -0700 | |
commit | dfcd3c0dc426bb75770c34b40e14f2da8845ea62 (patch) | |
tree | bd7e9f8463a18025c4775c6cdf22abbbd4236b64 /mm | |
parent | [PATCH] mm: set per-cpu-pages lower threshold to zero (diff) | |
download | linux-dfcd3c0dc426bb75770c34b40e14f2da8845ea62.tar.gz linux-dfcd3c0dc426bb75770c34b40e14f2da8845ea62.tar.bz2 linux-dfcd3c0dc426bb75770c34b40e14f2da8845ea62.zip |
[PATCH] Convert mempolicies to nodemask_t
The NUMA policy code predated nodemask_t so it used open coded bitmaps.
Convert everything to nodemask_t. Big patch, but shouldn't have any actual
behaviour changes (except I removed one unnecessary check against
node_online_map and one unnecessary BUG_ON)
Signed-off-by: "Andi Kleen" <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm')
-rw-r--r-- | mm/mempolicy.c | 120 |
1 files changed, 53 insertions, 67 deletions
diff --git a/mm/mempolicy.c b/mm/mempolicy.c index 1d5c64df1653..8bc0be1c9efd 100644 --- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -93,23 +93,10 @@ struct mempolicy default_policy = { .policy = MPOL_DEFAULT, }; -/* Check if all specified nodes are online */ -static int nodes_online(unsigned long *nodes) -{ - DECLARE_BITMAP(online2, MAX_NUMNODES); - - bitmap_copy(online2, nodes_addr(node_online_map), MAX_NUMNODES); - if (bitmap_empty(online2, MAX_NUMNODES)) - set_bit(0, online2); - if (!bitmap_subset(nodes, online2, MAX_NUMNODES)) - return -EINVAL; - return 0; -} - /* Do sanity checking on a policy */ -static int mpol_check_policy(int mode, unsigned long *nodes) +static int mpol_check_policy(int mode, nodemask_t *nodes) { - int empty = bitmap_empty(nodes, MAX_NUMNODES); + int empty = nodes_empty(*nodes); switch (mode) { case MPOL_DEFAULT: @@ -124,11 +111,11 @@ static int mpol_check_policy(int mode, unsigned long *nodes) return -EINVAL; break; } - return nodes_online(nodes); + return nodes_subset(*nodes, node_online_map) ? 0 : -EINVAL; } /* Copy a node mask from user space. */ -static int get_nodes(unsigned long *nodes, unsigned long __user *nmask, +static int get_nodes(nodemask_t *nodes, unsigned long __user *nmask, unsigned long maxnode, int mode) { unsigned long k; @@ -136,7 +123,7 @@ static int get_nodes(unsigned long *nodes, unsigned long __user *nmask, unsigned long endmask; --maxnode; - bitmap_zero(nodes, MAX_NUMNODES); + nodes_clear(*nodes); if (maxnode == 0 || !nmask) return 0; @@ -153,7 +140,7 @@ static int get_nodes(unsigned long *nodes, unsigned long __user *nmask, return -EINVAL; for (k = BITS_TO_LONGS(MAX_NUMNODES); k < nlongs; k++) { unsigned long t; - if (get_user(t, nmask + k)) + if (get_user(t, nmask + k)) return -EFAULT; if (k == nlongs - 1) { if (t & endmask) @@ -165,30 +152,29 @@ static int get_nodes(unsigned long *nodes, unsigned long __user *nmask, endmask = ~0UL; } - if (copy_from_user(nodes, nmask, nlongs*sizeof(unsigned long))) + if (copy_from_user(nodes_addr(*nodes), nmask, nlongs*sizeof(unsigned long))) return -EFAULT; - nodes[nlongs-1] &= endmask; + nodes_addr(*nodes)[nlongs-1] &= endmask; /* Update current mems_allowed */ cpuset_update_current_mems_allowed(); /* Ignore nodes not set in current->mems_allowed */ - cpuset_restrict_to_mems_allowed(nodes); + /* AK: shouldn't this error out instead? */ + cpuset_restrict_to_mems_allowed(nodes_addr(*nodes)); return mpol_check_policy(mode, nodes); } /* Generate a custom zonelist for the BIND policy. */ -static struct zonelist *bind_zonelist(unsigned long *nodes) +static struct zonelist *bind_zonelist(nodemask_t *nodes) { struct zonelist *zl; int num, max, nd; - max = 1 + MAX_NR_ZONES * bitmap_weight(nodes, MAX_NUMNODES); + max = 1 + MAX_NR_ZONES * nodes_weight(*nodes); zl = kmalloc(sizeof(void *) * max, GFP_KERNEL); if (!zl) return NULL; num = 0; - for (nd = find_first_bit(nodes, MAX_NUMNODES); - nd < MAX_NUMNODES; - nd = find_next_bit(nodes, MAX_NUMNODES, 1+nd)) { + for_each_node_mask(nd, *nodes) { int k; for (k = MAX_NR_ZONES-1; k >= 0; k--) { struct zone *z = &NODE_DATA(nd)->node_zones[k]; @@ -205,11 +191,11 @@ static struct zonelist *bind_zonelist(unsigned long *nodes) } /* Create a new policy */ -static struct mempolicy *mpol_new(int mode, unsigned long *nodes) +static struct mempolicy *mpol_new(int mode, nodemask_t *nodes) { struct mempolicy *policy; - PDprintk("setting mode %d nodes[0] %lx\n", mode, nodes[0]); + PDprintk("setting mode %d nodes[0] %lx\n", mode, nodes_addr(*nodes)[0]); if (mode == MPOL_DEFAULT) return NULL; policy = kmem_cache_alloc(policy_cache, GFP_KERNEL); @@ -218,10 +204,10 @@ static struct mempolicy *mpol_new(int mode, unsigned long *nodes) atomic_set(&policy->refcnt, 1); switch (mode) { case MPOL_INTERLEAVE: - bitmap_copy(policy->v.nodes, nodes, MAX_NUMNODES); + policy->v.nodes = *nodes; break; case MPOL_PREFERRED: - policy->v.preferred_node = find_first_bit(nodes, MAX_NUMNODES); + policy->v.preferred_node = first_node(*nodes); if (policy->v.preferred_node >= MAX_NUMNODES) policy->v.preferred_node = -1; break; @@ -239,7 +225,7 @@ static struct mempolicy *mpol_new(int mode, unsigned long *nodes) /* Ensure all existing pages follow the policy. */ static int check_pte_range(struct mm_struct *mm, pmd_t *pmd, - unsigned long addr, unsigned long end, unsigned long *nodes) + unsigned long addr, unsigned long end, nodemask_t *nodes) { pte_t *orig_pte; pte_t *pte; @@ -256,7 +242,7 @@ static int check_pte_range(struct mm_struct *mm, pmd_t *pmd, if (!pfn_valid(pfn)) continue; nid = pfn_to_nid(pfn); - if (!test_bit(nid, nodes)) + if (!node_isset(nid, *nodes)) break; } while (pte++, addr += PAGE_SIZE, addr != end); pte_unmap(orig_pte); @@ -265,7 +251,7 @@ static int check_pte_range(struct mm_struct *mm, pmd_t *pmd, } static inline int check_pmd_range(struct mm_struct *mm, pud_t *pud, - unsigned long addr, unsigned long end, unsigned long *nodes) + unsigned long addr, unsigned long end, nodemask_t *nodes) { pmd_t *pmd; unsigned long next; @@ -282,7 +268,7 @@ static inline int check_pmd_range(struct mm_struct *mm, pud_t *pud, } static inline int check_pud_range(struct mm_struct *mm, pgd_t *pgd, - unsigned long addr, unsigned long end, unsigned long *nodes) + unsigned long addr, unsigned long end, nodemask_t *nodes) { pud_t *pud; unsigned long next; @@ -299,7 +285,7 @@ static inline int check_pud_range(struct mm_struct *mm, pgd_t *pgd, } static inline int check_pgd_range(struct mm_struct *mm, - unsigned long addr, unsigned long end, unsigned long *nodes) + unsigned long addr, unsigned long end, nodemask_t *nodes) { pgd_t *pgd; unsigned long next; @@ -318,7 +304,7 @@ static inline int check_pgd_range(struct mm_struct *mm, /* Step 1: check the range */ static struct vm_area_struct * check_range(struct mm_struct *mm, unsigned long start, unsigned long end, - unsigned long *nodes, unsigned long flags) + nodemask_t *nodes, unsigned long flags) { int err; struct vm_area_struct *first, *vma, *prev; @@ -403,7 +389,7 @@ asmlinkage long sys_mbind(unsigned long start, unsigned long len, struct mm_struct *mm = current->mm; struct mempolicy *new; unsigned long end; - DECLARE_BITMAP(nodes, MAX_NUMNODES); + nodemask_t nodes; int err; if ((flags & ~(unsigned long)(MPOL_MF_STRICT)) || mode > MPOL_MAX) @@ -419,19 +405,19 @@ asmlinkage long sys_mbind(unsigned long start, unsigned long len, if (end == start) return 0; - err = get_nodes(nodes, nmask, maxnode, mode); + err = get_nodes(&nodes, nmask, maxnode, mode); if (err) return err; - new = mpol_new(mode, nodes); + new = mpol_new(mode, &nodes); if (IS_ERR(new)) return PTR_ERR(new); PDprintk("mbind %lx-%lx mode:%ld nodes:%lx\n",start,start+len, - mode,nodes[0]); + mode,nodes_addr(nodes)[0]); down_write(&mm->mmap_sem); - vma = check_range(mm, start, end, nodes, flags); + vma = check_range(mm, start, end, &nodes, flags); err = PTR_ERR(vma); if (!IS_ERR(vma)) err = mbind_range(vma, start, end, new); @@ -446,45 +432,45 @@ asmlinkage long sys_set_mempolicy(int mode, unsigned long __user *nmask, { int err; struct mempolicy *new; - DECLARE_BITMAP(nodes, MAX_NUMNODES); + nodemask_t nodes; if (mode < 0 || mode > MPOL_MAX) return -EINVAL; - err = get_nodes(nodes, nmask, maxnode, mode); + err = get_nodes(&nodes, nmask, maxnode, mode); if (err) return err; - new = mpol_new(mode, nodes); + new = mpol_new(mode, &nodes); if (IS_ERR(new)) return PTR_ERR(new); mpol_free(current->mempolicy); current->mempolicy = new; if (new && new->policy == MPOL_INTERLEAVE) - current->il_next = find_first_bit(new->v.nodes, MAX_NUMNODES); + current->il_next = first_node(new->v.nodes); return 0; } /* Fill a zone bitmap for a policy */ -static void get_zonemask(struct mempolicy *p, unsigned long *nodes) +static void get_zonemask(struct mempolicy *p, nodemask_t *nodes) { int i; - bitmap_zero(nodes, MAX_NUMNODES); + nodes_clear(*nodes); switch (p->policy) { case MPOL_BIND: for (i = 0; p->v.zonelist->zones[i]; i++) - __set_bit(p->v.zonelist->zones[i]->zone_pgdat->node_id, nodes); + node_set(p->v.zonelist->zones[i]->zone_pgdat->node_id, *nodes); break; case MPOL_DEFAULT: break; case MPOL_INTERLEAVE: - bitmap_copy(nodes, p->v.nodes, MAX_NUMNODES); + *nodes = p->v.nodes; break; case MPOL_PREFERRED: /* or use current node instead of online map? */ if (p->v.preferred_node < 0) - bitmap_copy(nodes, nodes_addr(node_online_map), MAX_NUMNODES); + *nodes = node_online_map; else - __set_bit(p->v.preferred_node, nodes); + node_set(p->v.preferred_node, *nodes); break; default: BUG(); @@ -506,9 +492,10 @@ static int lookup_node(struct mm_struct *mm, unsigned long addr) /* Copy a kernel node mask to user space */ static int copy_nodes_to_user(unsigned long __user *mask, unsigned long maxnode, - void *nodes, unsigned nbytes) + nodemask_t *nodes) { unsigned long copy = ALIGN(maxnode-1, 64) / 8; + const int nbytes = BITS_TO_LONGS(MAX_NUMNODES) * sizeof(long); if (copy > nbytes) { if (copy > PAGE_SIZE) @@ -517,7 +504,7 @@ static int copy_nodes_to_user(unsigned long __user *mask, unsigned long maxnode, return -EFAULT; copy = nbytes; } - return copy_to_user(mask, nodes, copy) ? -EFAULT : 0; + return copy_to_user(mask, nodes_addr(*nodes), copy) ? -EFAULT : 0; } /* Retrieve NUMA policy */ @@ -578,9 +565,9 @@ asmlinkage long sys_get_mempolicy(int __user *policy, err = 0; if (nmask) { - DECLARE_BITMAP(nodes, MAX_NUMNODES); - get_zonemask(pol, nodes); - err = copy_nodes_to_user(nmask, maxnode, nodes, sizeof(nodes)); + nodemask_t nodes; + get_zonemask(pol, &nodes); + err = copy_nodes_to_user(nmask, maxnode, &nodes); } out: @@ -649,15 +636,15 @@ asmlinkage long compat_sys_mbind(compat_ulong_t start, compat_ulong_t len, long err = 0; unsigned long __user *nm = NULL; unsigned long nr_bits, alloc_size; - DECLARE_BITMAP(bm, MAX_NUMNODES); + nodemask_t bm; nr_bits = min_t(unsigned long, maxnode-1, MAX_NUMNODES); alloc_size = ALIGN(nr_bits, BITS_PER_LONG) / 8; if (nmask) { - err = compat_get_bitmap(bm, nmask, nr_bits); + err = compat_get_bitmap(nodes_addr(bm), nmask, nr_bits); nm = compat_alloc_user_space(alloc_size); - err |= copy_to_user(nm, bm, alloc_size); + err |= copy_to_user(nm, nodes_addr(bm), alloc_size); } if (err) @@ -723,9 +710,9 @@ static unsigned interleave_nodes(struct mempolicy *policy) nid = me->il_next; BUG_ON(nid >= MAX_NUMNODES); - next = find_next_bit(policy->v.nodes, MAX_NUMNODES, 1+nid); + next = next_node(nid, policy->v.nodes); if (next >= MAX_NUMNODES) - next = find_first_bit(policy->v.nodes, MAX_NUMNODES); + next = first_node(policy->v.nodes); me->il_next = next; return nid; } @@ -734,18 +721,17 @@ static unsigned interleave_nodes(struct mempolicy *policy) static unsigned offset_il_node(struct mempolicy *pol, struct vm_area_struct *vma, unsigned long off) { - unsigned nnodes = bitmap_weight(pol->v.nodes, MAX_NUMNODES); + unsigned nnodes = nodes_weight(pol->v.nodes); unsigned target = (unsigned)off % nnodes; int c; int nid = -1; c = 0; do { - nid = find_next_bit(pol->v.nodes, MAX_NUMNODES, nid+1); + nid = next_node(nid, pol->v.nodes); c++; } while (c <= target); BUG_ON(nid >= MAX_NUMNODES); - BUG_ON(!test_bit(nid, pol->v.nodes)); return nid; } @@ -878,7 +864,7 @@ int __mpol_equal(struct mempolicy *a, struct mempolicy *b) case MPOL_DEFAULT: return 1; case MPOL_INTERLEAVE: - return bitmap_equal(a->v.nodes, b->v.nodes, MAX_NUMNODES); + return nodes_equal(a->v.nodes, b->v.nodes); case MPOL_PREFERRED: return a->v.preferred_node == b->v.preferred_node; case MPOL_BIND: { @@ -1117,7 +1103,7 @@ int mpol_set_shared_policy(struct shared_policy *info, PDprintk("set_shared_policy %lx sz %lu %d %lx\n", vma->vm_pgoff, sz, npol? npol->policy : -1, - npol ? npol->v.nodes[0] : -1); + npol ? nodes_addr(npol->v.nodes)[0] : -1); if (npol) { new = sp_alloc(vma->vm_pgoff, vma->vm_pgoff + sz, npol); |